The protein encoded by this gene is a subunit of the multisubunit NADH:ubiquinone oxidoreductase. Mammalian complex I is composed of 45 different subunits. It is located at the mitochondrial inner membrane. This protein has NADH dehydrogenase activity and oxidoreductase activity. It transfers electrons from NADH to the respiratory chain. The immediate electron acceptor for the enzyme is believed to be ubiquinone.
Cell adhesion protein SQM1; CI-B18; complex I B18 subunit; Complex I-B18; NADH dehydrogenase (ubiquinone) 1 beta subcomplex, 7, 18kDa; NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 7; NADH-ubiquinone oxidoreductase B18 subunit; NDUFB7